Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Power factor corrected 3-phase Ac-dc power converter using natural modulation

Inactive Publication Date: 2012-10-30
HERBERT EDWARD
View PDF26 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024]This invention also teaches that when a 3-phase pfc 100% duty-ratio buck converter and a 3-phase pfc 0% duty-ratio boost converter are used in a series-parallel or a parallel-series arrangement, the series connections whether on the input or the output constrain the currents of both sections, giving effective control of the current balance to the 3-phase pfc 100% duty-ratio buck converter. Similarly, the parallel connections, whether on the input or the output constrain the voltages of both sections, giving eff

Problems solved by technology

No energy needs to be shunted in and out of storage capacitors, an inefficient operation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power factor corrected 3-phase Ac-dc power converter using natural modulation
  • Power factor corrected 3-phase Ac-dc power converter using natural modulation
  • Power factor corrected 3-phase Ac-dc power converter using natural modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049]With the exception of FIG. 21, all of the graphs in the figures are from SPICE simulation using the SPICE oscillograph function. The graphs were copied and pasted into a CAD program where they were edited for appearance, but none of the waveforms were altered.

[0050]The pfc 3-phase ac-dc power converter 1 of FIG. 1 uses ac switches 4 through 9 to switch the ac input voltages A, B and C to an inductor 10. A catch rectifier 1 conducts the current of the inductor 10 if the ac switches 4 through 9 are all off, as they may be part of the time during an over-voltage condition. An ac switch is defined as a switch that blocks voltage of either polarity when it is turned off. Back to back MOSFETs are commonly used as ac switches, as would be known by one skilled in the art of power converters. A variable dc-dc transformer 3 and an output capacitor 12 complete the circuit. The connections to the circuits within the variable dc-dc transformer 3 are not shown, as they are not a point of no...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A 3-phase pfc 100% duty-ratio buck converter and a 3-phase 0% duty-ratio boost converter can be used in parallel with their outputs in series to greatly reduce the ripple voltage in the output. They can also be used in series with their outputs in parallel to greatly reduce the ripple current in the output. A 3-phase 0% duty-ratio boost converter having isolated primary circuits for each phase is used when the inputs are in series.

Description

CROSS REFERENCE TO RELATED PATENT APPLICATIONS[0001]This application is a continuation in part of a provisional U.S. patent application Ser. No. 61 / 115,094 filed Nov. 16, 2008 and entitled Power Factor Corrected 3-phase Ac-dc Power Converter using “Natural Modulation”. This application is also a continuation in part of a provisional U.S. patent application Ser. No. 61 / 148,031 filed Jan. 28, 2009 and entitled Natural Modulation. Priority is claimed to the filing dates of these provisional US patent applications and they are incorporated herein by reference.[0002]This patent application relates to U.S. patent application Ser. No. 11 / 943,864, filed Nov. 21, 2007, and entitled 100% Duty-Cycle Buck-Derived and 0% Duty-Cycle Boost-Derived Power Factor Corrected (PFC) 3-Phase Ac-Dc Power Converters. This patent application issued as U.S. Pat. No. 7,633,782 on Dec. 15, 2009. This patent application is incorporated herein by reference.[0003]This patent application relates to U.S. patent appl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M7/00
CPCH02M1/4216H02M3/33592H02M3/3374Y02B70/126Y02B70/1475Y02B70/10Y02P80/10
Inventor HERBERT, EDWARD
Owner HERBERT EDWARD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com